Structure 30505000003004 · Pima County, AZ

Control Road over Gibb Wash

Carries Control Road over Gibb Wash, 1.5 Mi Ne/o Oracle Rdg Mn.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 4/9 · sets the rating

24 ft end to end, longest span 16 ft. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1950rebuilt 2004
Length24.0 ft7.3 m
Daily traffic85counted 2021
Last inspectedApril 2024every 24 months

Location

StateArizona
CountyPima
Location1.5 Mi Ne/o Oracle Rdg Mn
CarriesControl Road
CrossesGibb Wash
Coordinates32.48354, -110.70640

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length24.0 ft (7.3 m)
Max Span15.7 ft (4.8 m)
Deck Width16.1 ft (4.9 m)
Deck Area35.8 sq m
Main Spans2
Year Built1950 (reconstructed 2004)

Traffic

Avg Daily Traffic85 (2021)
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical4 — Foundations need monitoring
Structure Number030505000003004

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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